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Tom [10]
3 years ago
10

Robert says 12 divide by 3//4 = 9. He used the following steps: 12/1 × 3/4 = 36/4 What error did Robert make? A. Robert used sub

traction rather than multiplication. B. Robert used addition rather than multiplication. C. Robert forgot to find the reciprocal of before multiplying. D. Robert forgot to find the reciprocal of before multiplying.
Mathematics
1 answer:
wlad13 [49]3 years ago
8 0

Answer:

C and D are the same answers but one of those.

Step-by-step explanation:

Um, I got what Robert got, so by process of elimination, it must be C or D. I used multiplication, so it wasn't subtraction or addition. Meaning whatever a reciprocal is, I didn't do that.

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(7)(8)(9)<br><br> Geometry<br><br> Check Ans<br><br> 7) s = 15<br> 8) y = 64 x = 99<br> 9) 96
Katyanochek1 [597]
Problem 7: Correct
Problem 8: Correct
Problem 9: Correct

The steps are below if you are curious

===========================================================================================

Problem 7

S = 180*(n-2)
2340 = 180*(n-2)
2340/180 = n-2
13 = n-2
n-2 = 13
n = 13+2
n = 15

I'm using n in place of lowercase s, but the idea is the same. If anything, it is better to use n for the number of sides since S already stands for the sum of the interior angles. I'm not sure why your teacher decided to swap things like that.

===========================================================================================

Problem 8

First find y
y+116 = 180
y+116-116 = 180-116
y = 64

which is then used to find x. The quadrilateral angles add up to 180*(n-2) = 180*(4-2) = 360 degrees
Add up the 4 angles, set the sum equal to 360, solve for x

x+y+125+72 = 360
x+64+125+72 = 360 ... substitution (plug in y = 64)
x+261 = 360
x+261-261 = 360-261
x = 99

===========================================================================================

Problem 9

With any polygon, the sum of the exterior angles is always 360 degrees

The first two exterior angles add to 264. The missing exterior angle is x
x+264 = 360
x+264-264 = 360-264
x = 96

6 0
4 years ago
Which phrases below best describe the equation x - 240 = 91? (Select all)
nikdorinn [45]

Answer:

There isn't a specific answer in my knowledge but the answer that's matches with most of them is 149

5 0
3 years ago
Lisandro fabrica juguetes. Si tiene 100 ruedas ¿Cuantos autos puede armar?<br> Me aydan porfa
AVprozaik [17]

Answer:

25

Step-by-step explanation:

un carro tiene 4 ruedas, entonces divide 100 por 4

100÷4=25

3 0
2 years ago
In a circle with a 8 in radius, how long, in inches, is an arc associated with 2.6 radians.
Bingel [31]
S = r·α is the formula to find the arc length (s), given the radius (r), and angle measure (α) in radians.
If the angle measure is NOT given in radians you must convert to radians.

s = 8 · 2.6
s = 20.8 in
7 0
3 years ago
Find the missing digit of the following UPC code<br>0, 2, 8, 5, 0 ,0, 1, 1, 0, 7, 0 ■​
olga nikolaevna [1]
It’s the square and the number woidl be 0
6 0
3 years ago
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